CoreImage人脸识别

1.首先要导入CoreImage.framework框架
2.引入<CoreImage/CoreImage.h>头文件
<pre>
#import <CoreImage/CoreImage.h></pre>
<pre>
/**识别脸部*/
-(NSArray *)detectFaceWithImage:(UIImage *)faceImage
{
NSDictionary *opts = [NSDictionary dictionaryWithObject:
CIDetectorAccuracyHigh forKey:CIDetectorAccuracy];
CIDetector *detectoer=[CIDetector detectorOfType:CIDetectorTypeFace context:nil options:opts];
CIImage *ciimage=[CIImage imageWithCGImage:faceImage.CGImage];
NSArray *featrues=[detectoer featuresInImage:ciimage];
if(featrues.count>0)
return featrues;
return nil;
}</pre>
3.使用方法如下
<pre>
//脸部识别

• (void)viewDidLoad {
  [super viewDidLoad];

  //带人脸的照片
  UIImage *image=[UIImage imageNamed:@"face.png"];
  NSArray *results=[self detectFaceWithImage:image];
  //可能会存在多个脸部，这里只考虑一张脸的情况
  if(results.count>0)
  {
  CIFaceFeature *face=[results firstObject];
  if(face.hasSmile)
  NSLog(@"有微笑");
  if(face.leftEyeClosed)
  NSLog(@"左眼闭着的");
  if(face.rightEyeClosed)
  NSLog(@"右眼闭着的");
  if(face.hasLeftEyePosition)
  NSLog(@"左眼位置：%@",NSStringFromCGPoint(face.leftEyePosition));
  if(face.hasRightEyePosition)
  NSLog(@"右眼位置：%@",NSStringFromCGPoint(face.rightEyePosition));
  if(face.hasMouthPosition)
  NSLog(@"嘴巴位置：%@",NSStringFromCGPoint(face.mouthPosition));
  NSLog(@"脸部区域：%@",NSStringFromCGRect(face.bounds));
  if(face.bounds.size.width==face.bounds.size.height)
  NSLog(@"脸蛋是圆的-.-");
  }
  }</pre>